This is a great question carawilliams:

"Is there a condition she might have, or is she just gifted?"

My personal belief is, if your daughter is gifted this needs to be nurtured as much as possible. I know that there are Educational Psychologists that can assess to tell whether a child is gifted and talented (at least that's one suggestion I can think of to address that part).

As far as the part of whether or not your daughter has some sort of mental condition, I am glad that you are considering all possibilities. Unfortunately I can't comment much as I'm no expert in the field.

Which ever way this turns out, I wish your daughter a successful and prosperous future.